What are the ways in which the file can be detected as being uploaded or not? - Zend

What are the ways in which the file can be detected as being uploaded or not?

- There are certain functions used for the detection of the file and check whether the file is being uploaded properly or not.

- The use of isUploaded() function with the pre-defined parameters are used to check and it returns the boolean result.

- The use of getFileName() method is used to provide the latest releases of the file and returns the NULL.

- The use of getFileInfo() provides a way to make an empty file key that can be used to check whether the file is being uploaded or not.

- The flag is set for the isUploaded() method to false that allow the detection to be made easy.